Colin,

My Astron switching supply doesn't make any noise on 75, but it 
generates a wide band of hash on 17 meters.  At first I thought I was 
hearing the hash because I was using an indoor antenna, but I still 
heard it even after I put up a good antenna outside.  I love the 
concept of a switching supply, but I'm not willing to put up with the 
RF pollution.

Steve

On Monday 1/30/06 00:11 Colin McDonald wrote:
>the 23 amp kenwood switching power supply that I have makes nearly no RF
>noise, occasionally i will come across a small hash noise on 80 meters, but
>it really is nothing more then a noise, doesn't even register on the S
>meter...the only way i know its the power supply is because i have a regular
>transformer capacitor rectifier regulator rack mount beast that i use and i
>can turn the switching power supply off and hear the noise go away on the HF
>rig.
>But i have only noticed this in perhaps 2 small 1.5KC wide spaces on the
>3MHZ band.
>73
>Colin, V A6BKX
>----- Original Message -----
>From: "Steve Dresser" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Sunday, January 29, 2006 7:12 PM
>Subject: Re: ICOM 746 PRO!!!
>
>
> > On Sunday 1/29/06 19:45 John Miller wrote:
> > >I've got a switching power supply that won't get it any noise.
> > What brand is it, John?  I've heard that there are a few good ones,
> > but most of them generate a lot of RF noise.
> >
> > Steve
> >